menace3000 Posted April 11, 2007 Posted April 11, 2007 Just wonder how much more difficult gripper becomes as it's filed.....say per every 1mm....i know this is not an exact science but what do you guys think? Quote
Cannon Posted April 11, 2007 Posted April 11, 2007 Just wonder how much more difficult gripper becomes as it's filed.....say per every 1mm....i know this is not an exact science but what do you guys think? A little more? I always thought the idea behind BTR is to train the hand to have more power in that closed position. Basically training the ability to keep squeezing. I never thought it was about making the gripper tougher. In other words, I thought the element of difficultly with BTR came from the increased range of motion and not anything about the gripper's strength. What do you think? Quote
acorn Posted April 11, 2007 Posted April 11, 2007 It does both. Notice how the spring ramps up on the close. by filing the gripper you are not only working with additional range but the spring pressure will continue to increase if you close it further. - Aaron Quote ** Retired **
makey98 Posted April 11, 2007 Posted April 11, 2007 It does both. Notice how the spring ramps up on the close. by filing the gripper you are not only working with additional range but the spring pressure will continue to increase if you close it further.- Aaron Agreed! I don't know the poundage increase, but you are right about this. We need some redneck calibrations..... Quote Current Goals: COC #2.5 45# blob R-Grade 5/G8 DO Deck of cards <10 sec.
lifesnotfair Posted April 11, 2007 Posted April 11, 2007 Totally agree with Aaron.. not only are you working on a bigger ROM, but also the force required to make the handles touch is bigger when the gripper is filed. When I filed my #1 it became almost as hard as my BBSA. When I filed my #1.5 I could get 4 reps as opposed to 12-13 I got before filing. Quote
Scott Styles Posted April 11, 2007 Posted April 11, 2007 As a gripper gets stronger, the pressure to close it causes it to sink more deeply into your hand before the handles shut. This means you have to close your hands further on a harder gripper. I always thought one of the big value adds of the filed grippers was the ability to practice in the range of motion you do not normally hit with a weaker gripper. No idea how the strength scales. Quote You don't get a dog and do the barking yourself.
superfeemiman Posted April 11, 2007 Posted April 11, 2007 I don't know what the true strength scale is, but I can say that it definitely does get harder strength-wise. Whatever it is, the amount is noticeable even if you only shave a couple mm off. Quote #2 Right hand -- 12/17/06 Parallel, 2/11/07 CCS, 5/9/07 No-set ///// Left hand -- 2/11/07 Parallel, 4/7/07 CCS, 5/9/07 No-set #3 #4(lol)
StalwartSentinel Posted April 11, 2007 Posted April 11, 2007 Totally agree with Aaron.. not only are you working on a bigger ROM, but also the force required to make the handles touch is bigger when the gripper is filed.When I filed my #1 it became almost as hard as my BBSA. When I filed my #1.5 I could get 4 reps as opposed to 12-13 I got before filing. Now figure out the poundage difference between the BBSA and #1 and divide that number by the depth (in millimetres) of filing. That will give you a rough lbs/mm rating. Quote
makey98 Posted April 12, 2007 Posted April 12, 2007 Totally agree with Aaron.. not only are you working on a bigger ROM, but also the force required to make the handles touch is bigger when the gripper is filed.When I filed my #1 it became almost as hard as my BBSA. When I filed my #1.5 I could get 4 reps as opposed to 12-13 I got before filing. Now figure out the poundage difference between the BBSA and #1 and divide that number by the depth (in millimetres) of filing. That will give you a rough lbs/mm rating. This is getting kind of technical but I would think that the lb/mm of force wouldn't be constant. The force required would be increasing for each extra millimeter of closing because you are getting closer and closer the max tension that the spring can provide. But a rough estimate would be good enough. It doesn't really matter I guess, just interesting to talk about. I found this calculator and messed around with it a bit, but I couldn't really come up with anything.... Torsion spring calculator Quote Current Goals: COC #2.5 45# blob R-Grade 5/G8 DO Deck of cards <10 sec.
ewhood Posted April 12, 2007 Posted April 12, 2007 From physics we can determine that the force required to compress a spring is equal to 1/2*K*x^2 where K is the constant of the spring(what we really want to know), and x is the distance the spring is compressed. Though I am unsure if this still directly applies to a gripper spring as the path of the handles is circular, but it might be a good starting point. Quote
StalwartSentinel Posted April 12, 2007 Posted April 12, 2007 Totally agree with Aaron.. not only are you working on a bigger ROM, but also the force required to make the handles touch is bigger when the gripper is filed.When I filed my #1 it became almost as hard as my BBSA. When I filed my #1.5 I could get 4 reps as opposed to 12-13 I got before filing. Now figure out the poundage difference between the BBSA and #1 and divide that number by the depth (in millimetres) of filing. That will give you a rough lbs/mm rating. This is getting kind of technical but I would think that the lb/mm of force wouldn't be constant. The force required would be increasing for each extra millimeter of closing because you are getting closer and closer the max tension that the spring can provide. But a rough estimate would be good enough. It doesn't really matter I guess, just interesting to talk about. I found this calculator and messed around with it a bit, but I couldn't really come up with anything.... Torsion spring calculator You are 100% right. The first mm wouldn't be as tough as the last mm. The strength, would definitely be on an upward curve. Quote
ewhood Posted April 12, 2007 Posted April 12, 2007 Yes, it increases exponentially the further the gripper is compressed(much,much harder at full compression when compared to a small amount). The distance compressed is squared, so a seemingly small distance becomes much larger when calculating the required force to cause the compression. Quote
menace3000 Posted April 12, 2007 Author Posted April 12, 2007 I shaved ~6mm of dolegged handle and 4mm of the other handle on my BBSM making it 0.1-0.2 harder than my 2006 #3. My BBSM was around 2.7 before it was filed...very subjective but it just feels about there relative to my BBGM, tough HG300, #3 , and BBE.....still nowhere near my BBE but noticeably tougher than #3. Was just something I was thinking about. Great responses thus far. If some1 could try redneck calibrating that would be awesome. Quote
Autolupus Posted April 12, 2007 Posted April 12, 2007 That would probably be the easiest way to go. Get a gripper, calibrate and plot it. File a mm off, calibrate and plot it, then some more... Obviously, with empiricism, more is better, as it will average out any aberrant trends. The resultant curve plotted could be used to translate difficulty gains by filing to any other gripper, given that you know the starting strength. Quote Mike Mackenzie. Luceo non uro.
mbcx6pmw Posted April 12, 2007 Posted April 12, 2007 From physics we can determine that the force required to compress a spring is equal to 1/2*K*x^2 where K is the constant of the spring(what we really want to know), and x is the distance the spring is compressed. Though I am unsure if this still directly applies to a gripper spring as the path of the handles is circular, but it might be a good starting point. The force is just kx. 1/2*k*x^2 is the energy. So the force increase should be fairly linear. Quote Paul Wood
Autolupus Posted April 12, 2007 Posted April 12, 2007 Hooks law et al, lets see... Quote Mike Mackenzie. Luceo non uro.
menace3000 Posted April 12, 2007 Author Posted April 12, 2007 Didnt some1 already state that the increase in difficulty would be exponential and not linear? Quote
Autolupus Posted April 13, 2007 Posted April 13, 2007 Linear's lovely when you're talking power delivery on bikes. My old VTR1000 was lovely like that...but had shite forks! Quote Mike Mackenzie. Luceo non uro.
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